منابع مشابه
Proton stability in TeV-scale GUTs
We discuss the proton decay problem in theories with low gravity and/or GUT scales. We pointed out that the gravity induced proton decay can be indeed suppressed up to a desired level, while the GUT origin of the proton instability is rather problematic. To solve this problem we suggest the GUT model where the proton is stabile in all orders of perturbation theory. This can be simply achieved b...
متن کاملTev-scale Guts
The possibility of extra large spacetime dimensions has recently received considerable attention . One of the first serious investigations of the phenomenological properties of theories with extra large dimensions was made in Ref. , where the lightness of the supersymmetry-breaking scale was related to the largeness of a string-theoretic compactification radius. More recently, in Ref., extra la...
متن کاملProton Stability in 5d Guts with Orbifold Compactification
We construct SU(5) SUSY GUT in 5D compactified on S/Z2 orbifold where the matter fields are living in the five dimensional bulk. SU(5) symmetry is broken down to the Standard Model gauge group by the orbifold projection which automatically ensures stability of proton in all orders of perturbation theory. The model predicts extra mirror quark-lepton families which along with the GUT particles an...
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In grand unified theories based on orbifold constructions in higher dimensions, Higgsinomediated proton decay is absent. However, proton decay mediated by X and Y gauge bosons is typically enhanced to levels detectable by current and future experiments. We analyse the phenomenology of proton decay induced by the minimal coupling of X, Y gauge bosons. In particular, we show that the novel realiz...
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Abstract The first results on next-to-leading order QCD corrections to production of two Z bosons in hadronic collisions in the large extra dimension ADD model are presented. Various kinematical distributions are obtained to order αs in QCD by taking into account all the parton level subprocesses. We estimate the impact of the QCD corrections on various observables and find that they are signif...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2001
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(01)00776-6